Best Auth AI Skills & MCP Servers

MCP server for Robokassa payment API — generate payment URLs, check invoice status. 2 tools. MD5 signature auth.

DEPRECATED — install the Claude Code plugin at gramatr/claude-plugin instead. This npm package no longer ships a CLI; Codex and Gemini integrations are paused pending HTTPS+OAuth MCP support.

Zero-auth MCP server with everyday developer utilities: base64, UUID, hash, JWT decode, cron, timestamps, JSON, regex

A local MCP server that breaks on demand. Test your client against auth failures, disappearing tools, flaky responses, and token expiry.

The mcp-use CLI is a tool for building and deploying MCP servers with support for ChatGPT Apps, Code Mode, OAuth, Notifications, Sampling, Observability and more.

Gmail MCP server with auto authentication support

MCP server for Run402 — AI-native Postgres databases with REST API, auth, storage, and row-level security. Pay with x402 USDC micropayments.

Shared authentication library for F5 Distributed Cloud MCP servers - XDG-compliant profile management

Lightweight OAuth 2.0 callback handler for Node.js, Deno, and Bun with built-in browser flow and MCP SDK integration

Model Context Protocol server for the Lumeo Blazor component library. Lets LLMs (Claude, Copilot, Cursor) author correct Lumeo markup.

Unified MCP Streamable HTTP 2025-11-25 transport, OAuth 2.1 AS, lifecycle, install

A Model Context Protocol server for Google Calendar integration with auto authentication

Gmail MCP server with auto authentication support

stdio-to-HTTP MCP proxy for Grackle — bridges stdio-only MCP clients (Claude Desktop, Codex CLI, Clawpilot) to a Grackle HTTP MCP server using static API-key auth

Generic MCP shell for agent-driven remote Chrome control through cdp-bridge and canonical cdper packages

Comprehensive Model Context Protocol server for WordPress management with composition-based architecture, 59 tools, SEO toolkit, performance monitoring, intelligent caching, and production-ready authentication

Runtime, compiler, lint, CLI, and dashboard for Skillscript — a small declarative language for authoring agent workflows.

MCP client for discovering and exercising resources, tools, prompts, and completions over stdio or OAuth-protected HTTP. Ships with a CLI, an interactive REPL, and a web dashboard served by `mcp-inspector serve`.

Arguslog MCP server — exposes the full Arguslog API (issues, projects, orgs, alerts, releases, tier admin, …) as Model Context Protocol tools. Authenticate with a Personal Access Token from the dashboard.

Model Context Protocol server and tools for agent-qa authoring and triage.

NetSuite MCP server with OAuth 2.0 PKCE authentication. Works seamlessly with Claude Code, Cursor IDE, and other MCP clients.

Local-first MCP server for Claude/Codex project wiki and graph workflows

Security-hardened MCP server for Excalidraw with API key auth, rate limiting, and real-time canvas sync

MCP server for Google Sheets integration - Your AI Assistant's Gateway to Google Sheets!